My two cents! Love the sound for sure. Probably would have went with the Extreme if I knew the Classic rear pipe came real close to left passenger foot rest. Had to lower the footrest and now have to leave footrest down because unable to fold up. I chose the classics for the clean look on right side and that they did not go under frame but through. I installed the exhaust myself. Only real trouble I had was the heat shields and rear exhaust port bottom nut. Can only use a wrench from behind to tighten. Hope this helps anyone deciding to do their own install.